It's also a lot brighter outdoors than it is indoors (we're really good at adapting to different light levels, so it doesn't seem like a large change, but it is

It's also a lot brighter outdoors than it is indoors (we're really good at adapting to different light levels, so it doesn't seem like a large change, but it is). Recently I've read that simply being in a brighter environment has effects on the way your eyes develop when you're young.